The Application of the <i><b>G</b></i>-matrix Modification Methods to the Imaging of the 1-D Synthetic Aperture Microwave Radiometer

Aili ZHANG; Hao LIU; Lin WU; Lijie NIU; Cheng ZHANG; Xue CHEN; Ji WU

doi:10.11999/JEIT181067

Volume 41 Issue 11

Nov. 2019

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Article Navigation > Journal of Electronics & Information Technology > 2019 > 41(11): 2632-2638

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Aili ZHANG, Hao LIU, Lin WU, Lijie NIU, Cheng ZHANG, Xue CHEN, Ji WU. The Application of the G-matrix Modification Methods to the Imaging of the 1-D Synthetic Aperture Microwave Radiometer[J]. Journal of Electronics & Information Technology, 2019, 41(11): 2632-2638. doi: 10.11999/JEIT181067

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The Application of the G-matrix Modification Methods to the Imaging of the 1-D Synthetic Aperture Microwave Radiometer

doi: 10.11999/JEIT181067

Aili ZHANG^{1, 2},
Hao LIU^{1
,
,},
Lin WU¹,
Lijie NIU¹,
Cheng ZHANG¹,
Xue CHEN¹,
Ji WU^{1, 2}

1.
National Space Science Center, Chinese Academy of Sciences, Beijing 100190, China
2.
University of Chinese Academy of Sciences, Beijing 100049, China

Funds: The National Natural Science Foundation of China (41675035), Beijing Science and Technology Plan (Z161100002616033)

Received Date: 2018-11-22
Rev Recd Date: 2019-03-11

Available Online: 2019-04-12

Publish Date: 2019-11-01

Abstract

Abstract

The G -matrix model method is usually used to achieve the brightness temperature reconstruction for the one-Dimensional (1-D) synthetic aperture microwave radiometer system. For the 1-D radiometer system, the imaging process mainly includes: the radiometer instrument observes the full field of view of the 2-D target scene maps, and obtains the 1-D samples of the visibility, and then inverts the system parameter matrix G to realize the reconstruction of the 1-D image of the target scene. Since the system sampling baselines are only distributed in the 1-D of the spatial frequency domain, in the process of the brightness temperature image reconstruction, the matrix G needs to realize 2-D to 1-D conversion. Therefore, two G -matrix modification methods are proposed to improve the imaging quality for the 1-D synthetic aperture microwave radiometer. For the 8-element ground radiometer prototype system and the 10-element salinity radiometer system, theoretical analysis and simulation experiments have verified that the G -matrix modification methods proposed in this paper can effectively improve the imaging results, and can effectively suppress the imaging error caused by the side-lobed degradation of the antenna patterns.
- Synthetic aperture radiometer,
- Imaging algorithm,
- G-matrix,
- Side-lobed degradation

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References(18)

References

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